Portion of a power base



FIG. 1 is a perspective view of a portion of a power base showing ournew design;

FIG. 2 is a front view thereof.

FIG. 3 is a rear view thereof.

FIG. 4 is a right side view thereof.

FIG. 5 is a left side view thereof.

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The portions of the power base shown in broken lines are included forthe purpose of illustrating environment and form no part of the claimeddesign.

We claim the ornamental design for a portion of a power base, as shownand described.